- #1
- 111
- 0
Homework Statement
Assume an elastic collision (ignoring friction
and rotational motion).
A queue ball initially moving at 3.7 m/s
strikes a stationary eight ball of the same size
and mass. After the collision, the queue ball's
final speed is 2.1 m/s at an angle of theta with
respect to its original line of motion.
http://img506.imageshack.us/img506/3229/untitledjb3.png [Broken]
Find the eight ball's speed after the colli-
sion. Answer in units of m=s.
Homework Equations
p=mv
possibly energy equations
The Attempt at a Solution
This problem would've been alot easier if the problem provided theta's value. Without theta i only managed to get to this:
3.7=2.1cos(theta)+Vx
where Vx is the x component of the 8 ball after collision
0=2.1sin(theta)+Vy
where Vy is the y component of the 8 ball after collision
should i find theta first? or can I find one of the component's value first and then find theta?
Last edited by a moderator: